<template>
  <div class="Todos-container">
    <section class="todoapp">
      <TodoHeader @addTask="listAdd" :list="list"></TodoHeader>
      <TodoMain :list="listSo" @listRemove="listDel"></TodoMain>
      <TodoFooter
        @showFlag="showList"
        @creatDone="creatDonHodl"
        :farr="listSo"
      ></TodoFooter>
    </section>
    <el-collapse v-model="activeNames">
      <el-collapse-item title="代码截图" ame="2">
        <h3>Todo 模板</h3>
        <img
          class="image"
          src="@/assets/image/Todos/Snipaste_2021-12-13_16-04-43.png"
          alt=""
        />
        <h3>Todo 业务代码</h3>
        <img
          class="image"
          src="@/assets/image/Todos/Snipaste_2021-12-13_16-10-12.png"
          alt=""
        />
        <h3>TodoFooter</h3>
        <img
          class="image"
          src="@/assets/image/Todos/Snipaste_2021-12-13_16-10-37.png"
          alt=""
        />
        <h3>TodoHeader</h3>
        <img
          class="image"
          src="@/assets/image/Todos/Snipaste_2021-12-13_16-10-57.png"
          alt=""
        />
        <h3>TodoMain</h3>
        <img
          class="image"
          src="@/assets/image/Todos/Snipaste_2021-12-13_16-11-13.png"
          alt=""
        />
      </el-collapse-item>
    </el-collapse>
  </div>
</template>

<script>
import TodoHeader from '@/components/Day/Day3/Todo/TodoHeader.vue'
import TodoMain from '@/components/Day/Day3/Todo/TodoMain.vue'
import TodoFooter from '@/components/Day/Day3/Todo/TodoFooter.vue'

export default {
  components: {
    TodoHeader,
    TodoMain,
    TodoFooter
  },

  data() {
    return {
      activeNames: ['10'],
      list: JSON.parse(localStorage.getItem('list') || '[]'),
      isSel: 'all'
    }
  },
  watch: {
    list: {
      deep: true,
      handler() {
        localStorage.setItem('list', JSON.stringify(this.list))
      }
    }
  },
  methods: {
    listAdd(val) {
      this.list.push({
        id: this.list.length > 0 ? this.list[this.list.length - 1].id + 1 : 100,
        name: val,
        isDone: false
      })
    },
    listDel(id) {
      const index = this.list.findIndex(obj => obj.id === id)
      this.list.splice(index, 1)
    },
    showList(isSel) {
      this.isSel = isSel
    },
    creatDonHodl() {
      // 不考虑恢复直接删除
      this.list = this.list.filter(item => !item.isDone)
    }
  },
  computed: {
    listSo() {
      // 这里返回的是筛选的状态 filter 不会修改原数组 返回一个筛选结果组成的数组
      if (this.isSel === 'no') return this.list.filter(item => !item.isDone)
      if (this.isSel === 'yes') return this.list.filter(item => item.isDone)
      return this.list
    }
  },
  destroyed() {
    localStorage.removeItem('list')
  }
}
</script>

<style lang="less">
.Todos-container {
  .image {
    width: 100%;
    display: block;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.12), 0 0 6px rgba(0, 0, 0, 0.04);
    border-radius: 5px;
  }
  hr {
    margin: 20px 0;
    border: 0;
    border-top: 1px dashed #c5c5c5;
    border-bottom: 1px dashed #f7f7f7;
  }

  .learn a {
    font-weight: normal;
    text-decoration: none;
    color: #b83f45;
  }

  .learn a:hover {
    text-decoration: underline;
    color: #787e7e;
  }

  .learn h3,
  .learn h4,
  .learn h5 {
    margin: 10px 0;
    font-weight: 500;
    line-height: 1.2;
    color: #000;
  }

  .learn h3 {
    font-size: 24px;
  }

  .learn h4 {
    font-size: 18px;
  }

  .learn h5 {
    margin-bottom: 0;
    font-size: 14px;
  }

  .learn ul {
    padding: 0;
    margin: 0 0 30px 25px;
  }

  .learn li {
    line-height: 20px;
  }

  .learn p {
    font-size: 15px;
    font-weight: 300;
    line-height: 1.3;
    margin-top: 0;
    margin-bottom: 0;
  }

  #issue-count {
    display: none;
  }

  .quote {
    border: none;
    margin: 20px 0 60px 0;
  }

  .quote p {
    font-style: italic;
  }

  .quote p:before {
    content: '“';
    font-size: 50px;
    opacity: 0.15;
    position: absolute;
    top: -20px;
    left: 3px;
  }

  .quote p:after {
    content: '”';
    font-size: 50px;
    opacity: 0.15;
    position: absolute;
    bottom: -42px;
    right: 3px;
  }

  .quote footer {
    position: absolute;
    bottom: -40px;
    right: 0;
  }

  .quote footer img {
    border-radius: 3px;
  }

  .quote footer a {
    margin-left: 5px;
    vertical-align: middle;
  }

  .speech-bubble {
    position: relative;
    padding: 10px;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 5px;
  }

  .speech-bubble:after {
    content: '';
    position: absolute;
    top: 100%;
    right: 30px;
    border: 13px solid transparent;
    border-top-color: rgba(0, 0, 0, 0.04);
  }

  .learn-bar > .learn {
    position: absolute;
    width: 272px;
    top: 8px;
    left: -300px;
    padding: 10px;
    border-radius: 5px;
    background-color: rgba(255, 255, 255, 0.6);
    transition-property: left;
    transition-duration: 500ms;
  }

  @media (min-width: 899px) {
    .learn-bar {
      width: auto;
      padding-left: 300px;
    }

    .learn-bar > .learn {
      left: 8px;
    }
  }

  //-------------------
  button {
    margin: 0;
    padding: 0;
    border: 0;
    background: none;
    font-size: 100%;
    vertical-align: baseline;
    font-family: inherit;
    font-weight: inherit;
    color: inherit;
    -webkit-appearance: none;
    appearance: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  body {
    font: 14px 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.4em;
    background: #f5f5f5;
    color: #111111;
    min-width: 230px;
    max-width: 550px;
    margin: 0 auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-weight: 300;
  }

  :focus {
    outline: 0;
  }

  .hidden {
    display: none;
  }

  .todoapp {
    background: #fff;
    margin: 130px 0 40px 0;
    position: relative;
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 25px 50px 0 rgba(0, 0, 0, 0.1);
  }

  .todoapp input::-webkit-input-placeholder {
    font-style: italic;
    font-weight: 300;
    color: rgba(0, 0, 0, 0.4);
  }

  .todoapp input::-moz-placeholder {
    font-style: italic;
    font-weight: 300;
    color: rgba(0, 0, 0, 0.4);
  }

  .todoapp input::input-placeholder {
    font-style: italic;
    font-weight: 300;
    color: rgba(0, 0, 0, 0.4);
  }

  .todoapp h1 {
    position: absolute;
    top: -140px;
    width: 100%;
    font-size: 80px;
    font-weight: 200;
    text-align: center;
    color: #b83f45;
    -webkit-text-rendering: optimizeLegibility;
    -moz-text-rendering: optimizeLegibility;
    text-rendering: optimizeLegibility;
  }

  .new-todo,
  .edit {
    position: relative;
    margin: 0;
    width: 100%;
    font-size: 24px;
    font-family: inherit;
    font-weight: inherit;
    line-height: 1.4em;
    color: inherit;
    padding: 6px;
    border: 1px solid #999;
    box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  .new-todo {
    padding: 16px 16px 16px 60px;
    border: none;
    background: rgba(0, 0, 0, 0.003);
    box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
  }

  .main {
    position: relative;
    z-index: 2;
    border-top: 1px solid #e6e6e6;
  }

  .toggle-all {
    width: 1px;
    height: 1px;
    border: none; /* Mobile Safari */
    opacity: 0;
    position: absolute;
    right: 100%;
    bottom: 100%;
  }

  .toggle-all + label {
    width: 60px;
    height: 34px;
    font-size: 0;
    position: absolute;
    top: 12px;
    left: -13px;
    -webkit-transform: rotate(90deg);
    transform: rotate(90deg);
    z-index: 9999;
  }

  .toggle-all + label:before {
    content: '❯';
    font-size: 22px;
    color: #e6e6e6;
    padding: 10px 27px 10px 27px;
  }

  .toggle-all:checked + label:before {
    color: #737373;
  }

  .todo-list {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .todo-list li {
    position: relative;
    font-size: 24px;
    border-bottom: 1px solid #ededed;
  }

  .todo-list li:last-child {
    border-bottom: none;
  }

  .todo-list li.editing {
    border-bottom: none;
    padding: 0;
  }

  .todo-list li.editing .edit {
    display: block;
    width: calc(100% - 43px);
    padding: 12px 16px;
    margin: 0 0 0 43px;
  }

  .todo-list li.editing .view {
    display: none;
  }

  .todo-list li .toggle {
    text-align: center;
    width: 40px;
    /* auto, since non-WebKit browsers doesn't support input styling */
    height: auto;
    position: absolute;
    top: 0;
    bottom: 0;
    margin: auto 0;
    border: none; /* Mobile Safari */
    -webkit-appearance: none;
    appearance: none;
  }

  .todo-list li .toggle {
    opacity: 0;
  }

  .todo-list li .toggle + label {
    /*
		Firefox requires `#` to be escaped - https://bugzilla.mozilla.org/show_bug.cgi?id=922433
		IE and Edge requires *everything* to be escaped to render, so we do that instead of just the `#` - https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7157459/
	*/
    background-image: url('data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23ededed%22%20stroke-width%3D%223%22/%3E%3C/svg%3E');
    background-repeat: no-repeat;
    background-position: center left;
  }

  .todo-list li .toggle:checked + label {
    background-image: url('data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23bddad5%22%20stroke-width%3D%223%22/%3E%3Cpath%20fill%3D%22%235dc2af%22%20d%3D%22M72%2025L42%2071%2027%2056l-4%204%2020%2020%2034-52z%22/%3E%3C/svg%3E');
  }

  .todo-list li label {
    word-break: break-all;
    padding: 15px 15px 15px 60px;
    display: block;
    line-height: 1.2;
    transition: color 0.4s;
    font-weight: 400;
    color: #4d4d4d;
  }

  .todo-list li.completed label {
    color: #cdcdcd;
    text-decoration: line-through;
  }

  .todo-list li .destroy {
    display: none;
    position: absolute;
    top: 0;
    right: 10px;
    bottom: 0;
    width: 40px;
    height: 40px;
    margin: auto 0;
    font-size: 30px;
    color: #cc9a9a;
    margin-bottom: 11px;
    transition: color 0.2s ease-out;
  }

  .todo-list li .destroy:hover {
    color: #af5b5e;
  }

  .todo-list li .destroy:after {
    content: '×';
  }

  .todo-list li:hover .destroy {
    display: block;
  }

  .todo-list li .edit {
    display: none;
  }

  .todo-list li.editing:last-child {
    margin-bottom: -1px;
  }

  .footer {
    padding: 10px 15px;
    height: 50px;
    text-align: center;
    font-size: 15px;
    border-top: 1px solid #e6e6e6;
  }

  .footer:before {
    content: '';
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 50px;
    overflow: hidden;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), 0 8px 0 -3px #f6f6f6,
      0 9px 1px -3px rgba(0, 0, 0, 0.2), 0 16px 0 -6px #f6f6f6,
      0 17px 2px -6px rgba(0, 0, 0, 0.2);
  }

  .todo-count {
    float: left;
    text-align: left;
  }

  .todo-count strong {
    font-weight: 300;
  }

  .filters {
    margin: 0;
    padding: 0;
    list-style: none;
    position: absolute;
    right: 0;
    left: 0;
  }

  .filters li {
    display: inline;
  }

  .filters li a {
    color: inherit;
    margin: 3px;
    padding: 3px 7px;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: 3px;
  }

  .filters li a:hover {
    border-color: rgba(175, 47, 47, 0.1);
  }

  .filters li a.selected {
    border-color: rgba(175, 47, 47, 0.2);
  }

  .clear-completed,
  html .clear-completed:active {
    float: right;
    position: relative;
    line-height: 20px;
    text-decoration: none;
    cursor: pointer;
  }

  .clear-completed:hover {
    text-decoration: underline;
  }

  .info {
    margin: 65px auto 0;
    color: #4d4d4d;
    font-size: 11px;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
    text-align: center;
  }

  .info p {
    line-height: 1;
  }

  .info a {
    color: inherit;
    text-decoration: none;
    font-weight: 400;
  }

  .info a:hover {
    text-decoration: underline;
  }

  /*
	Hack to remove background from Mobile Safari.
	Can't use it globally since it destroys checkboxes in Firefox
*/
  @media screen and (-webkit-min-device-pixel-ratio: 0) {
    .toggle-all,
    .todo-list li .toggle {
      background: none;
    }

    .todo-list li .toggle {
      height: 40px;
    }
  }

  @media (max-width: 430px) {
    .footer {
      height: 50px;
    }

    .filters {
      bottom: 10px;
    }
  }
}
</style>
